CVE-2026-64565 Affecting linux-6.12 package, versions <6.12.101-1~deb12u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LINUX612-18912415
  • published18 Aug 2026
  • disclosed4 Aug 2026

Introduced: 4 Aug 2026

CVE-2026-64565  (opens in a new tab)

How to fix?

Upgrade Echo:latest linux-6.12 to version 6.12.101-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()

The ims_pcu_process_data() processes incoming URB data byte by byte. However, it fails to check if the read_pos index exceeds IMS_PCU_BUF_SIZE.

If a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE, read_pos will increment indefinitely. Moreover, since read_pos is located immediately after read_buf, the attacker can overwrite read_pos itself to arbitrarily control the index.

This manipulated read_pos is subsequently used in ims_pcu_handle_response() to copy data into cmd_buf, leading to a heap buffer overflow.

Specifically, an attacker can overwrite the cmd_done.wait.head located at offset 136 relative to cmd_buf in the ims_pcu_handle_response(). Consequently, when the driver calls complete(&amp;pcu-&gt;cmd_done), it triggers a control flow hijack by using the manipulated pointer.

Fix this by adding a bounds check for read_pos before writing to read_buf. If the packet is too long, discard it, log a warning, and reset the parser state.

[dtor: factor out resetting packet state, reset checksum as well]

CVSS Base Scores

version 3.1